NaCl对库拉索芦荟的胁迫效应研究

doi:10.3321/j.issn:1000-7091.2005.05.018

摘要/Abstract

摘要： 温室盆栽条件下，研究了100~400mmol/L NaCl胁迫对2年生库拉索芦荟的生长及体内离子分布的影响。结果表明，100mmol/L NaCl处理下芦荟植株干重和叶片叶绿素含量与对照差异不显著，200和400mmol/L NaCl处理下干重和叶绿素含量显著下降；芦荟根系活力在200mmol/L NaCl处理下达到最大值，增加盐浓度，根系活力下降；盐胁迫处理的叶片电解质渗漏率显著高于对照，随着胁迫强度的增加而增加。盐胁迫下，芦荟体内Na⁺和Cl^-含量随着盐浓度的增加而增加，K⁺和Ca²⁺表现出相反的变化趋势。Na⁺主要积累在茎部，叶片和根系含量较小；Cl^-主要积累在叶片，茎部含量相对高于根系。盐胁迫下芦荟体内K⁺和Ca²⁺含量明显低于对照，随着盐浓度增加，叶片K⁺含量明显增加，Ca²⁺则相反。芦荟叶片保持相对较低的Na⁺/K⁺比率和较强的K⁺和Ca²⁺向上选择性运输能力，是芦荟具有一定耐盐性的重要原因。

关键词: 库拉索芦荟, 盐胁迫, 离子分布

Abstract: In the greenhouse,pot experiment was conducted to study the effect of 100-400mmol/L NaCl on the growth and ion distribution of two-year Aloe vera.The results showed that the dry weight and leaf chlorophyll content of Aloe vera appeared indistinctive difference between treatments of 100mmol/L NaCl and control,the plant dry weight and chlorophyll content showed notable decline under 200 and 400mmol/L NaCl treatment.The root activity of Aloe vera reached the maximum value under 200mmol/L NaCl treatment,and it decreased with the increase of salt concentration;Leaf electrolytic leakage under salt stress was higher than the control and increased with the salt concentration enhancement.Under salt stress,content of Na⁺ and Cl^- increased with the salt concentration,and it appeared the opposite change for the K⁺ and Ca²⁺ content in Aloe vera.Na⁺ was mainly accumulated in the stem of Aloe vera,content of Na⁺ in the leaves and root was lower;Cl^- was mainly accumulated in the leaves and the content in the stem was higher than the root.The content of K⁺ and Ca²⁺ in Aloe vera was lower under salt stress contrast with the control,content of K⁺ in the leaves increased obviously and the Ca²⁺ content decreased.It had lower Na⁺/K⁺ value and stronger transportation ability for K⁺ and Ca²⁺,which were main reasons to explain salt-tolerance of Aloe vera.

Key words: Aloe vera, salt stress, ion distribution

中图分类号:

S682.33

宁建凤, 刘兆普, 刘玲, 邵晶. NaCl对库拉索芦荟的胁迫效应研究[J]. 华北农学报, 2005, 20(5): 70-75. doi: 10.3321/j.issn:1000-7091.2005.05.018.

NING Jian-feng, LIU Zhao-pu, LIU Ling, SHAO Jing. Study of Effect of NaCl Stress on Aloe vera[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2005, 20(5): 70-75. doi: 10.3321/j.issn:1000-7091.2005.05.018.

http://www.hbnxb.net/CN/Y2005/V20/I5/70

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